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Currently the Grape-Express Mini development board is on Kickstarter. It's a microcontroller board like the Arduino Mega2560 R3, but this board includes a lot more than just Bluetooth, Wifi, and self-sufficiency. If there is interest, then look on the web page. The goal is not set high but...
I'm trying to build a wearable device with wifi connection, but I cant find any which is small enough to wear as a bracelet.
My objective is to use a heart beat sensor on this device, connect it to the internet and send it to my database.
Any suggestions? Right now I'm using ESP32